How To Fix FKK_ID_XX_SAFT002 - Function module &1 and &2 must have the same parameter settings

FKK_ID_XX_SAFT002 - Overview

• Message type: E = Error

• Message class: FKK_ID_XX_SAFT - SAFT message

• Message number: 002

• Message text: Function module &1 and &2 must have the same parameter settings

What causes this issue?

You are creating a function module based in a pre-delivered function
module and you are not able to assign it in the Customizing.

System Response

The system requires that the parameter settings of the function module
you are creating are the same as the pre-delivered function module. You
cannot proceed with the assignment.

How to fix this error?

Check the parameter settings of your function module and make sure they
match with the ones in the pre-delivered function module.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

FKK_ID_XX_SAFT002 - Details

• The SAP error message FKK_ID_XX_SAFT002 indicates that there is a mismatch in the parameter settings between two function modules that are being called. This typically occurs in the context of SAP's Flexible Real Estate Management (RE-FX) or Contract Accounts Receivable and Payable (FI-CA) modules, where function modules are expected to have consistent parameter definitions.
  
  Cause:
  The error arises when:
  
  Two function modules are being called in a way that requires them to have the same parameter settings (e.g., input/output parameters, data types).
  There may be a custom implementation or enhancement that is incorrectly configured, leading to the mismatch.
  Changes in the SAP system (like updates or modifications) may have altered the expected parameter settings.
  
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Function Module Definitions:
  
  Use transaction code SE37 to check the definitions of the function modules mentioned in the error message (denoted as &1 and &2).
  Compare the parameter settings of both function modules to